Disk-sharpening machine.



E. STRASMA. DISK SHARPENING MACHINE.

APPLICATION FILED NOV. 18. 1913.

1,189,013. PatentedJune27, 1916.

UNITED STATES PATENT OFFICE.

EDWARD STRASMA, 0F GILMAN, ILLINOIS.

DISK-SHARPENIN'G MACHINE.

Application filed November 18, 1913.

To all whom it may concern Be it known that I, EDWARD STRAsMA, a citizenof the United States, residing at Gilman, in the county of Iroquois,State of Illinois, have invented certain new and useful Improvements inDisk-Sharpening Machines; and I do hereby declare the following to be afull, clear, and exact description of the invention, such as will enableothers skilled in the art to which it appertains to make and use thesame.

This invention relates to disk sharpening machines and has for an objectto provide a novel power shaft which may be easily and quickly engagedand disengaged from the disk shaft.

A further object is to provide novel means for sharpening the disks.

With the above objects in view the invention consists of certain noveldetails of construction and combination of parts hereinafter fullydescribed and claimed, it being understood that various modificationsmay be made in the minor details of construction within the scope of theappended claim.

In the accompanying drawings illustrating this invention :Figure 1 is aside elevation showing a disk sharpening machine embodying myimprovements. Fig. 2, is a transverse section on the line 22 of Fig. 1,and Fig. 3, a section on the line 33 of Fig. 2.

Referring now to the drawings in which like characters of referencedesignate similar parts, the device is shown to comprise a platform 10that is supported by legs 11 at the ends. A driven shaft 13 is journaledand slidably fitted in bearings 14: disposed on top of the platform. Anangle iron plate 15 is fixed to the platform. A latch in the nature of aplate 18 is hinged as shown at 19 on said plate to form an abutment forthe end of the shaft, the plate being bent outwardly at the top edge asshown at 20 to produce a stop which upon swinging down of the platebears upon the top edge of the angle iron plate 15 and limits downwardmovement of the latch, while at the same time providing a grip by meansof which the latch may be swung open or closed. The opposite end of thedriven shaft is equipped with a socket 21 to receive the disk shaft 2 1.The disk shaft is held revolubly as will presently be de- Specificationof Letters Patent.

Serial No. 801,658.

scribed in alinement with the driven shaft, and to couple the drivenshaft to the disk shaft in order to rotate the latter, the driven shaftwhich is-normallyslid back through the opening 17 in the angle ironplate, is slid forwardly until the socket 21 engages with the end of thedisk shaft, the latch 18 being'then closed to hold the driven shaft slidforwardly whereby to maintain the socket in engagement with the diskshaft. After the disks have been sharpened, the latch is rocked open andthe driven shaft slid back to disengage the socket from the disk shaft.It will thus be evident that I have provided an extremely simple andquick means for operatively connecting the driven and disk shafts.

For actuating the power shaft a shaft 25 is journaled on the bottom ofthe platform and is equipped with a drive pulley 27 which may beoperatively connected to any desired motive power. This shaft rotates asecond shaft 28, there being a chain drive 30 operatively connectingthese shafts. A second chain drive 31 connects the shaft 28 with thedriven shaft 13.

My invention further includes a means for supporting the disk shaft 24in alinement with the power shaft, such means including a platform 32that is supported upon legs 33 and is equipped on its top face withbearings 34 which receive the disk shaft 24:. .These bearings revolublyhold the disk shaft in alinement with the driven shaft.

For sharpening the disks I provide a substantially oblong frame 35 thatis provided at the bottom with a central projection 36 and is providedat the top with a laterally directed grip 37. A cross bar 38 isadjustably secured at the ends to the sides of the frame by means ofhook bolts 39, and carries a central strap bracket 40 in which thesharpening element 11 is secured by means of a set screw 42. This deviceis operated by hand, the operator gripping the handle or grip 37 in onehand and positioning the projection upon the platform 32 in such amanner that the sharpening edge of the sharpening element 11 bears uponthe edge of the disk whereby during rotation the disk is sharpened.

From the above description it will be seen that I have provided anextremely simple and inexpensive device of the character de- PatentedJune 27, 1916.

its terminals slidably engaged with the side members of the frame, and asharpening element adjustably mounted on said cross 15 bar, for movementin a plane at right angles to the plane of the frame.

In testimony whereof I afliX my signature, in the presence of twowitnesses.

EDWARD STRASMA.

\Vitnesses R. M. POLLOGH, EVA L. Boon.

Copies of this patent may be obtained tor five cents each, by addressingthe Commissioner of Patents, Washington, D. G.

